National Science Olympiad Forum By SOF Olympiad Trainer - Page 286

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Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

Class : Class 1

D

There two 'S' in the word 'COSMOS' so, 'COSMOS' cannot be made from the given word.


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Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

Class : Class 1

B

Tweezers are third class lever whereas see-saw, crowbar and scissors are first class levers.


Ans 2:

Class : Class 7
Well, why don't they teach all this stuff in the synopsis?!They should, but, Admin from revisewise is correct.

Ans 3:

Class : Class 8
Admin is correct

Ans 4:

Class : Class 7
I think that he/she is.

Ans 5:

Class : Class 2
The person called admin is correct

Ans 6:

Class : Class 7

Ans 7:

Class : Class 5
snow white are you too selected this year 2020-2021

Ans 8:

Class : Class 8

Ans 9:

Class : Class 5
What are first class levers and second class levers?

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Subject :NSO    Class : Class 5

Ans 1: (Master Answer)

Class : Class 1

B

 Embankment is built on the banks of the river. It stops the water of the river from flooding the fields.


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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 8
plastic is a bad conductor then it would be C

Ans 2:

Class : Class 8
I agree with Srijan Anand !!!

Ans 3:

Class : Class 8
True plastic is a BAD CONDUCTOR but it’s not an INSULATOR right? So possibly it would naturally take some time .

Ans 4:

Class : Class 7
Plastic is not a good conductor of heat. So how should the answer be A?

Ans 5:

Class : Class 8
I agree.

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Subject :NSO    Class : Class 7

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Subject :NSO    Class : Class 7

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Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

Class : Class 1

B

A. Incorrect - The first metro service was inaugurated in Kolkata in 1984 by former Prime Minister Indira Gandhi.
B. Correct 
C. Incorrect - Transport facilities are necessary for International trade.
D. Incorrect - Auto rickshaw are used by passengers to travel short distances in the same city or village.


Ans 2:

Class : Class 8
ADMIN YOUR MASTER ANSWER CORRECT

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Subject :NSO    Class : Class 8

The given diagram shows nitrogen cycle in the ecosystem. P, Q, R, S and T represent different chemical conversion steps in the cycle.


Which process (P - T) is correctly paired with the organismal group performing that step?
I. P Nitrobacter
II. Q Bacteria symbiotic with plants
III. R Denitrifying bacteria
IV. S Nitrifying bacteria
V. T Nitrogen fixing bacteria, such as Rhizobium or cyanobacteria

AIII, IV and V
BIV and V
CI, III and IV
DIII and IV


c=correct answer

Ans 1:

Class : Class 7

Ans 2: (Master Answer)

Class : Class 1

C


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Subject :NSO    Class : Class 2

Ans 1: (Master Answer)

Class : Class 1

D

All insects lay eggs and have six legs. Head louse (D) is a wingless insect. So it cannot fly. Mosquito (B) and housefly (C) are winged insects so they can fly. Spider (A) is not an insect. It has eight legs. It does not have wings so it also cannot fly.


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Subject :NSO    Class : Class 3

Ans 1: (Master Answer)

Class : Class 1

B

A. This beak is strong and curved. Parrots have such beaks. It allows them to crack nuts, bite hard fruits and grip barks and branches of trees.
B. This beak is long, thin and tubular. Humming birds have such beaks. These beaks can be inserted into the narrow center portion of the flowers and birds can drink nectar through them.
C. This beak is broad and flat with holes. Ducks have such beaks. Ducks in ponds gulp water in these beaks, they keep the aquatic plants, fish and insects inside the beak, while water seeps out the tiny holes present in the beak.
D. This beak is strong, sharp and hooked. Eagles have such beaks. It allows them to tear off and eat the flesh of the prey.
Hence, the right answer is option B.


Ans 2:

Class : Class 3
b

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